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Electrode assembly

a technology of electromechanical components and components, applied in the manufacture of secondary cells, secondary cell details, final product manufacturing, etc., can solve problems such as unpredictability and power outag

Active Publication Date: 2013-10-24
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a pressure-sensitive adhesive tape that can fill gaps and fix electrode assemblies in place, preventing movement or shaking. The tape includes a photoinitiator and a multifunctional crosslinking agent in a specific ratio to induce a curing reaction and maintain physical properties. The peel strength of the tape can be controlled by adjusting the ratio of the multifunctional crosslinking agent. The tape can be attached to the electrode assembly and maintained in a flat shape until it comes into contact with the electrolyte, at which point it forms a 3D shape to fill the gap and fix the assembly.

Problems solved by technology

In this case, the electrode assembly received in the can may move or rotate to some degree inside the can due to external vibration or impact.
In this case, inner circuits may be disconnected due to damage of a welded region of a tab, thereby causing undetected power outage.

Method used

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Examples

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Effect test

example 2

Preparative Example 2

Manufacture of Urethane Acrylic Substrate Layer

[0132]After mixing 40 parts by weight urethane acrylate and 70 parts by weight isobornyl acrylate (IBOA) as diluents, 0.5 parts by weight of a photoinitiator (Irgacure-184, 1-hydroxyl cyclohexyl phenylketone) was further added, mixed, and defoamed to prepare a composition. The prepared composition was coated on a polyester release film to have a thickness of approximately 40 μm using a bar coater. The polyester release film was covered on the coating layer in order to prevent contact of oxygen and then the composition was cured by irradiation with light of the UV-A region at a radiation intensity of 800 mJ / cm2 using a metal halide lamp to manufacture a substrate layer. A strain of the manufactured substrate layer in a longitudinal direction was approximately 43%.

example 3

Preparative Example 3

Manufacture of Epoxy Acrylic-Based Substrate Layer

[0133]After mixing 60 parts by weight epoxy acrylate, 38 parts by weight IBOA, and 2 parts by weight acrylic acid, 1.2 parts by weight of a photoinitiator (Irgacure-184, 1-hydroxyl cyclohexyl phenylketone) was further added, mixed, and defoamed to prepare a composition. The prepared composition was coated on a polyester release film to have at thickness of approximately 40 μm using a bar coater. The polyester release film was covered on the coating layer in order to prevent contact of oxygen and then the composition was cured by irradiation with light of the UV-A region at a radiation intensity of 800 mJ / cm2 using a metal halide lamp to manufacture a substrate layer. A strain of the manufactured substrate layer in a longitudinal direction was approximately 11%.

example 4

Preparative Example 4

Manufacture of Cellulose-Based Substrate Layer

[0134]A raw material including a cellulose acetate propionate compound having a number average molecular weight (Mn) of 70,000 as measured by GPC was molded as a substrate layer having a thickness of approximately 40 μm using T-die. A strain of the manufactured substrate layer in a longitudinal direction was approximately 20%.

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Abstract

An electrode assembly and a battery are provided. The electrode assembly may be effectively fixed inside a can as a pressure-sensitive adhesive tape attached to an outer circumferential surface of the electrode assembly is formed into a 3D shape by an electrolyte. Thus, the electrode assembly does not move and rotate inside the can due to external vibration or impact and damage of welded regions of a tab or disconnection of inner circuits can be prevented.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a Bypass Continuation of PCT International Application No. PCT / KR2012 / 000672 filed on Jan. 27, 2012, which claims priority to and the benefit of Korean Patent Application No. 10-2011-0008160, filed Jan. 27, 2011, and Korean Patent Application No. 10-2012-0008488, filed Jan. 27, 2012, the disclosure of which are incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present application relates to an electrode assembly and a battery.[0004]2. Discussion of Related Art[0005]A secondary cell can convert electric energy into chemical energy, store the chemical energy, and generate electricity as necessary. A lead storage battery, a nickel-cadmium (NiCd) battery, a nickel-hydrogen (NiMH) storage battery, a lithium ion (Li-ion) battery and a Li-ion polymer battery are known as secondary cells.[0006]A battery may be manufactured, for example, by receiving an electrode assembly inside ...

Claims

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Application Information

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IPC IPC(8): H01M10/02C09J7/02H01M10/04C09J7/22C09J7/25C09J7/26C09J7/29
CPCH01M10/02H01M10/0431C09J7/0264C09J7/0246C09J2401/006C09J2203/33C09J2433/006C09J2433/00C09J2463/00C09J2463/006C09J2475/00C09J2475/006H01M10/049H01M6/005C09J7/22Y10T29/49114Y10T428/28Y10T428/2852Y10T428/24521Y10T428/287Y10T428/2891Y02E60/10Y02P70/50C09J201/00C09J2301/312C09J7/38C09J133/04B32B37/02C09J7/241C09J7/245C09J7/25C09J7/26C09J7/29H01M50/20H01M50/293H01M4/04B32B27/285B32B27/308B32B27/36B32B27/38B32B27/40C09J133/08
Inventor KIM, SUNG JONGJUNG, BYUNGKYUKU, CHA-HUN
Owner LG ENERGY SOLUTION LTD
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